<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        #l1{color: green}
        .c1{color: blue}
        input[type='text'],body>p{background-color: red}
        body>div>div>p{color: pink}
        div div p{
            background-color: yellow;
        }
        a:link{color: green}
        a:visited{color: red}
        a:hover{color: yellow}
        a:active{color: pink}
    </style>
</head>
<body>
<ul>
  <li id="l1">刘德华</li><li>张学友</li><li class="c1">郭富城</li>
</ul>
<p>香蕉</p><p class="c1">苹果</p>
<input type="text"><input type="password">
<div>
  <p>p1</p>
  <div>
      <p>p2</p>
  </div>
  <div>
      <div>
          <p>p3</p>
      </div>
  </div>
</div>
<a href="http://www.qq.com">腾讯</a>
</body>
</html>